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For Stilfold, the advantage of doing this with metal is to strengthen that material without requiring lots of brackets, screws or supports – reducing the overall volume of material required, and therefore also the cost and embodied carbon emissions of any product made with the technique. "We can achieve about 20-30% material reduction just by adding stiffness," says Nyvang.，更多细节参见哔哩哔哩
getter block : Proc(Nil)? = nil，更多细节参见wps下载
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